South DakotaDepartment of Transportation
Transportation
Aviation
About Office of Aeronautics Services
Office of Aeronautics Services
Airports Conference
Aerospace Education
Airport Information
Links
Aviation Systems Plan
Bridges
Office of Bridge Design
Design & Plans
Historical Bridges
Inventory & Inspection
Posted Structures
Reference Information
SD Bridge Photos
Doing Business
Certification & Accreditation
About Certification & Accreditation
SDDOT Accreditation Certification List
Approved Products
Manuals & Documents
Welding Certifications
Training
Contractors
Bid Letting Information
Concrete Pipe Release
Contractors/Suppliers
Prequalified Contractors
CMS Web Reports
Disadvantaged Business Enterprise (DBE)
Fuel Price Index
Labor Compliance
Materials
Preconstruction Meetings
Price Adjustment Guidelines
Standard Specifications
Subcontract Requirements
Forms & Documents
Webinars
Alternative Contracting
Engineering/Design Services
Consultant Services
Downloadable Files
Manuals
News & Updates
Right of Way / Relocation Assistance
Standard Bid Items
Standard Plates
Surveyors
Utility Coordination
Environmental
About Environmental
Agreements
Endangered Species
Environmental Assessments
Forms
Stormwater
Wetland Mitigation
Local Governments
About Local Governments
Bridge Improvement Grants
City/County Fund Balances
Emergency Relief (ER)
Federal Bridge Program
Forms & Documents
Secure Accounts Billing
Transportation Economic Development Grants
Urban Systems
Rural Access Infrastructure Fund Program
Traffic Incident Management
Training
Projects & Studies
Planning
Carbon Reduction Strategy
Freight Plan
Long Range Plan
Metropolitan Planning Organization
Non-state Public Road Inventory
Pavement Condition Monitoring
Pavement Management
South Dakota EV Fast Charging Plan
Statewide Transportation Improvement Program – STIP
Transportation Asset Management Plan (TAMP)
Construction Projects
Inside SDDOT
Forms & Publications
Brochures
Forms
Manuals
Maps
Newsletters
Reports
SDDOT Engagement Opportunities
Join One of Our Contact Lists
Press Releases
Media Kits
News Stories
Branding and Identity Guidelines
Learn More about the SDDOT Logo
SDDOT Blog
Press Releases
SDDOT Seeks Public Input on Environmental Assessment and Section 4f Evaluation for Interstate 229 Exit 3 Interchange in Sioux Falls
October 28, 2025
The South Dakota Department of Transportation (SDDOT), in collaboration with the Sioux Falls Metropolitan Planning Organization (MPO), and the City of Sioux Falls, will hold an in-person public meeting open house on Wednesday, Nov. 5, 2025, from 5-6:30 p.m. (CT).
Traffic Shift and Overnight Lane Closures Scheduled on Interstate 90 at Hartford (Exit 387)
October 15, 2025
Beginning on Thursday, Oct. 16, 2025, traffic will be shifted onto the new pavement and bridge on Western Avenue over Interstate 90 at exit 387 (Hartford).
SDDOT Seeks Public Input for Proposed S.D. Highway 25 Reconstruction Project (S.D. Highway 34 to the Hanson/Miner County Line)
October 13, 2025
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house on Tuesday, Oct. 28, 2025, from 5:30 – 7 p.m. (CT) to inform area residents of the proposed S.D. Highway 25 reconstruction project from S.D. Highway 34 to the Hanson/Miner County line.
SDDOT Seeks Public Input for Proposed Reconstruction Project at U.S. Highway 85 and Colorado Boulevard Intersection in Spearfish
October 13, 2025
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house on Tuesday, Oct. 28, 2025, at 5:30 p.m. (MT) to inform area residents of the proposed project to reconstruct the intersection of U.S. Highway 85 and Colorado Boulevard in Spearfish.
Road Closure Scheduled for U.S. Highway 385 from Pactola Dam to Taylor Ranch Road Near Hill City
October 10, 2025
Beginning on Monday, Oct. 20, 2025, U.S. Highway 385 from the south end of Pactola Dam to Taylor Ranch Road will be closed to through traffic.
